Apparatus for dumping, depositing, or releasing loads suspended from cranes &amp;c.



No. 637,I82., y Patented N'ov. I4, |899. I vv`.|. a J. n. T|5-|\1P.|:RLEY.l A EAPABATUS FUR DQHPING, DEPSITING, 0R RELEASING LOMlS.v SUSPENDED FROM CKRANES, 696. v .(Appumion ma :um 29, 199e.)

y I-IIV Shsstlfshnt 2.

No. 637,|82. Patented Nov. I4, |899.

` J. J. R. TEMPERLEY.

APPARATUS FUR DU'MVPING, DEPOSITINGpOR RELEASING LADS SUSPENDED FROM CRANES, &c.

" (Application filed June 28, 189.)

No. Gamez. Painted Nov |4', |a99.

y A J. J'. R. TEMPERLEY.' APPARATUS fOR DUHPlNG, DEPUSITING, UBB'ELEASING LUDS SUSPENDED FROM cnmqss, &c.

v (Appximion ma :um 2e, rase.)

(Nolodel.) v I3 Shasta-Sheet 4 ngi' No. 637,182. Patented Nov. I4, |899.

J. & J. R. TEMPERLEY.

APPARATUSIFOR DUMPING, DEPOSITING, 0R HELEASINQ LDADS SUSPENDED ERDM (Application mea .rune 2s, 189s.)

(No Model.) I3 Sheets-Sheet 5.

No. 631mg. Patented Nov.` I4, |899,`

J. & .1.12. TEMPERLEY. f

APPAnATus Fon nuMPmG, uEPoslTmG,V on Aix-:LEASING LoAns SUSPENDED Fnom cnANEs, sw'.

' (Application mea .rune 2s, 189s.) (N o M o del.)

r Wag/4A I3 Sheets-Sheet 7.

APPARATUS Fon numPmS, nEPoSmNG, on ffl-:LEASING LoAoS SUSPENDED Fnom CRANES, asus.v

l 4(App'xicatnm mea .rune 2a, 189s.) (No Model.) f

Platented Nov. l4,-|899.

- l. J. R. TEMPERLEY. APPARATUS FRl DUMPING, DEPUSTING, OB RELEASING LOADS SUSPENDED FRDM CHANES, 81,6.

(Application filed June 28, 1898.)

(No Model.)

Patented Nov. i4, |899.

.1. & '4.12. TEMPERLEY. APPARATUS FUR DUMPING, DEPOSITING, 0B RELEASING LDADS SUSPENDED FROM C R A N E S, &c. (Application med .rune 2 8, 189s.)

lla vsham-shaun m.

(No Modei.)

. No..637,|82. Patented Nov. (4, |899.

* J. &. J. R. TEMPERLEY. A APPARATUS FOB DUMPING, DEPOSl-TING, 0R B ELEASING LOADS SUSPENDED FROM calmes.Y am.

(Application led June' 28, 189B.) l

un mail.) |3 sheets-sheet Fay. a.

No. 63u32.' Patented Nov. I4, |399.

.1. &...|. n. TEMPERLEY- APPARATUS FUR DUMPING, DEPSITING, 0R HELEASING LADS SUSPENDED FRM CRANES, 8m.v

(Application filled June 28, 1898.)

le. Smets-sneer |z.

(No Model.)

k N0. 637,182. Patented Nov.'|4, |899.

J. J. R. TEMPERLEY. APPARATUS FUR DUMPING, UEPDSITI'NG, 0B RELEASING LDADS SUSPENDED FROM CRANES, &,c\.

(Application led June 28, 1898.)

(Nn Model.)

I3 Sheets-Sheet I3.

NITED Srlrrns PATENT OFFICE..

JOSEPH TEMPERV'LEY AND JOHN RIDLEY TEMPERLEY, oF LONDON,

ENGLAND. y

" APPARATUS' For Dui/irme. DEPoSmNG, 0R .Rut/sine Lo'ADs SUSPENDEDy mom vCRAM-s, t.

. sPncIFIcA'rIoNfoming part orI Letters Patent No. eazleadaeea November 14, 1899.-:

rppiicaeonnannezs,189s. serian. 684,691. cromati To all whom it 'may concern; y Be it known that-we, JOSEPH TEMPERLEY and JOHNRIDLEY TEMPERLEY, engineers,

subjects of the Queen of Great Britain, residing at 72 Bishupsgat'e street, London, Eng-l land, have invented certain new and useful v Improvements in Apparatus forDumping,De

positing, or Releasing Loads Suspended from -Cranes, Transporters, and other Hoisting-Machines, of which the following is a specification, reference being hadtothe accompanyingdrawings, in which-el v Figure-1 is a sidev elevation, partly in vertical longitudinal section, showing one form of our` improved apparatus applied to the' traveler of a transporter, Fig. 2 is anend elevation, partly yin vertical section, on the line x m, Fig. 1. Fig. 3y is ay vertical longitudinal section, Fig. 4 a plan,par tly inherizgontal l'sectionfand' Fig..5 a transverse secn tion on the line 5c', Fig. 3, all drawn to an enlarged scale, showing the pawl-carrier and adgacent parts. Fig. 6y is a transverse section position.

through the pawl-'carrier on the line rc2, Fig.

3. Fig. 7 is a similar View, to Fig. 3, some of the moving parts being shown vin a different position. Fig. 8 shows a portion of Fig. 2 with somev of the moving, partsin a different- Fig., 9 isa side elevation, partly in vertical section, illustrating another form or modification of oui-improved apparatus. Fig.

10 is a similar view, the parts being shown in a different position and soine of the parts being removed. Fig. 1l is a vertical longitudinal central section, and Fig. 12 a plan,-partly in horizontal section-,showing modified arrangement of the pawLcarrier. Fig.' 13 is a side elevation, partly in vertical section,show ing another modification of our invention.

Fig. 14 is a similar View, the partsbein g shown in a dilerent position. Fig. 15 is an endelevation, partly in transverse section, of the apparatus shown in Fig. 14, illustrating also the connection with the bucket-latch. Fig.

16 is a similar view to Fig. 13, the parts -being shown in -a different position. Fig. 17 is being shown in` a different position, andfFigs'. 2O and 21 are side elevations, and fFig. 22 a sectional side elevation, illustrating further `modifications of our said invention. Fig. 23 is a side elevation, partly in ver-tical section,

and Fig.,24 is a front elevation,'partl y in sec-I tion, on the line x3 :1:3,Fig- 23, showing an-v other arrangement for releasing the bucket. Figs. 25 and 26 are sectional elevations' illustrating the application of our invention/)to idifferent forms of dumping-grabs.

Our invention relates to improved 'appaf' ratus for dumping, depositing, or' releasing loads lifted by cranes, transporters, andother kinds of hoisting or conveying machines.'

The chief object of our invention is to provide im proved` means whereby thel emptyingf ofa bucket or grab or the releasing 'of'aload suspended from a'crane, transport-er, 'or other hoisting-machine can be eiectedby means of the rope or chain used for raising and. low-'ering the load.` Heretofore in some forms of'- apparatus used for this purpose it has been necessary to employ a supplementary or auxiliary operating rope or chain for releasing or dumping the load. In other forms osufch apparatus a device iseniployed whichwillv operate to release or dump the load when' it has been'lowered to a predetermined position; but in such cases the load cannotbe released or dumped' either above or belowfsuch predetermined position.v With all of these forms of apparatus either the ground oran attachment to the track must be usedas a fulcrum to perform the operation of releasing o r dumping'theload. A i

Now by our invention, without employing an auxiliary rope or chain and with onlyl the suspended load as a lfulcrum, we providefor the releasing or dumping of the load at whatever height the load may be from the ground or other surface upon which it is to b e de- 'posited and without such heightbeing predetermined.; With our apparatus, moreover, a load can be raised and then lowered to any erator and the load then dumpedivithout the bucket coming in contact with the ground.

" Our invention will therefore save the break- .position that vmay be determined Iby the oplos p and hauling in of the lifting rope or 'chain is any and every position to which the load can' e i 637,18e

releasing or tipping mechanism for hoisting-` or conveying apparatus, whichis adapted to be operated by alternation of the paying out be raised, lowered, or transported'I This mechanism is preferably constructed with a reversible pawl or pawls arranged to 'be cocked by the movement of the lifting rope or chain in one direction, so that the said mechanism can then be operated by a reversal of the movement of said rope or chain.

Our said invention also partly consists in a hoisting or conveying apparatus comprising members suspended from the lifting rope or .chain and one of which is movable relatively to the other by both the paying out and haulingin of said rope or-chaiu, and means to release or dump the load, said means being carried by one of said members and actuated by the relative movement of the other of said members, whereby the load can be dumped at any andevery position to which it can be,

raisedand lowered or transported.

` Our said invention also partly consists in the combinatiomwith the lifting ropeor chain, of members suspended from said rope or chain and one of which is movable relatively to the' other by both the paying out and hauling in of said rope or chain, and a load-releaser adaptedzto'bring about the dumping of the load, which load-releaser is carried by one of said members and is first setor adjusted by relative movement `of the other of said mem? bers in one direction and then actuated by relative movement of said member in the reverse direction to bring about the release or dumping of the load. A

Our said invention also partly consists in the combination of hoisting or lifting tackle comprising a lifting rope or chain and members suspended therefrom, one of which is movable relatively to the other by both the paying out and hauling in of said rope or chain, means to keep the load suspended from said rope or chain, a load-releaset` carried by one of said members and adapted to bring about the dumping of the load, a proection or shoulder on the other of said memers adapted in the paying out and hauling in of said rope-or chain to first set' or adjust said load-releaser andl then actuate the sam e, Ind a pivoted lever whereby said load-releaser il thrown out of lgear after the load is dumped or released. 'y

.Our said invention also partly consists in an apparatus for dumping or releasing loads suspended from a lifting-rope and comprising l retaining device suspended from said lifting-ropefortemporarilypreventingthedumph or release ot the suspended load, a mova e pawl-carrier having a reversible pawl 'and adapted when moved in one direction to disengage said retaining device, a support for' said pawl-carrier suspended from said liftingrope, and a shouldered member also suspended from said lifting-rope, whereby in the payingl out and hauling in of said lifting-rope said reversible pawl is first cocked and saidpawhcarrier then moved through the medium of the said reversible pawl to bringv about the dumping or release of the suspended load. L d

Our said invention also 'partly consists in the combination, with a'lifting or hoisting tackle, of a frame suspended from the liftingrope, a pawl-carrier with a reversible-pawl mounted in said frame, a 'load-releasing cord or chain connected with said pawlcarrier, and a shouldered member also suspended from said lifting-rope and movable relatively to said frame,wherebylin the payingout and hauling in of said lifting-rope said reversible pawl is first cockedand said pawl-carrier then actuated through the medium of the saidfre-` versible pawl to haul in said releasing-cord or chain, and thus bring about the dumping or releaseof the load.'

Our said invention further partly consists tackle, of load releasing or tipping mechanism suspended from the lifting rope or chain ofA such tackle, an operatingfdevice therefor also suspended from said .lifting rope or chain, and a leveror other shiftingr device whereby said mechanism is thrown out -of gear after the dumping or release of the load and -will be'automatically thrown into' gear when a fresh load is lifted or transported to a predetermined position, so that the load can be released or dumped in that position or after being raised,lowered,or transported to any other position. safeguard in the-'use of the apparatus and is very advantageous. It is, however, not absolutely necessary and can be dispensed with, if so desired, and our said invention further consists in lthe combination, construction,and arrangement of theload releasing or tipping mechanism, as hereinafter more particularly described, .and set forth in the claims.

v In Figs. 1 to 8 we have shown our .improvements applied to a traveler A, adapted to be moved along an overhead track B by means of the lifting-rope D, a bucketF beingsuspended from the fall-bloekfofthesaid traveler by means of a bridle or bail F.' pawhcarrier G is adapted to slide to and fro in a guideway or race f in the frame f of thefall-block beneath the sheave H. This pawlll-earrier is connected at one end by means of!v a cord or chain G' passing over ,guide-pulleys F2 to a rllhis arrangement affords an extra IIO latch J, suitably arranged in the bail F' of the bucket F, so that when the chain G' is pulled adapted to engage with'cocking-shoulders H and operating-shoulders H3 at opposite ends of recesses H' in the sheave H, which recesses are deeper at the end H2 than at the other end H3, as shown.

In the rotation of the sheave H While the fall-block]` and bucket F are being raised,

' with the load, into the position shown in Figs.

l and 2 the pawls K are merely depressed by the shoulders H3 of the said sheave. When, however, the load is lowered and the sheave H rotates in the direction indicated by the arrow in Fig. 1, the'shoulder H2 which first strikes the pawls K will cock the same or turn them so that they point vto theright. Therefore when the fall-block f is again raised and the sheave H rotated in the direction indicated by thearrow in Fig. 3 the shoulder g H3 which firstcomes in contact with the pa`wls K will engage therewith, as shown in Fig. 3, and move the carrier G toward the left along the guideway or race f2 into 'the position indicated by dotted lines in Fig. 3. In this manner the cord or chain G will be hauled in, so as to disengage the latch and permit the dumping of the load by Athe tilting of the bucket F about its trunnions F3.

In order that the pawlK shall when free always return to and remain inthe inoperative position, as shown in Fig. 7, untilcocked or turned over to the right by the shoulder' H2, its pivot-pin K'is provided with a pinion K2, geared with a rack L on a' rod or bar L',

which is adapted to slide longitudinally With- .against the guides G3, respectively. In the cockingof the pawls K the pinion K2 moves the. bar L'V to the left,'as shown in Fig. 3, in which position it is locked by means of a hook L5 at its extremity engaging with a latch L6, which is movable in transverse slots in vthe carrier G and is acted upon by'a spring L7. The pawl is thus prevented from turning back to the left in the recess H' after having been cocked. Instead of locking the pawl in this manner we sometimes effect the same purpose by providing a iiat spring which extends across the recess H', as-indicated by dotted lines in Fig.v 3; This flat spring is strong enough to prevent .the pawls being turned by the action of the spiral'spring L2, but yields 'to allow the pawl to turn when being cocked by the shoulder H2. Vhe'n the carrier Ghas been moved to the end of its travel by the sheave H, as indicated by dotted linesin Fig. 3, an extension of the latch L6 comes against an vinclined projection j on the frame f ofthe fall-block, whereby the said latch L6 is pushed in and the rod L' released.

the trailing projections G5 on thel'carrier G, f.

which sustain said carrier in the way f2, fall through slot-s or recesses f3 inthe guideway f2, so as to withdraw the pawls from the sheave H and allow thesaid pawls to be returned to their original position bythe reaction of the spring L2. Stops f4 are provided for limiting the movement ofthe pawl-carrier G.

In the form of latch shown in Figs. 1, 2, and 8 the latching-bolt .I is pivotally mounted in the lower part of a vertically-movable block J', and when the latch is in engagement with the notched barFiL on the bucket F the said block J' rests on the upper surface of a fixed block J2, another `verticallymovable block J3 resting on the block J and having pivoted to it a hooked bent lever J4, which extendsthrough a 'slotin the block J When the block J3, to which the cord or chain G' is attached, is raised by the movement of the carrier G, the hook of the lever .I4 engages with a shoulder J 3 on the block J ',which is also raised, thus forcibly withdrawing the latching-boltJ and releasing the bucket, as shown in Fig. 8, the arm J then resting against a stop J7 in the block J', leaving n o part projecting beyond the edge of the bail F' to interfere with the replacing of the bail on the trunnion F3. 'Wheat-he bail F' has been hooked onto the trunnions of a full bucket, the lever J4 is pressed in by hand, thereby unhooking the block S', which falls back onto the xed block J2, and then on raising the bail to the verticalposition thelatch J engages the notch F4 of the bucket. To reset the carrier G ready for the next operation, it may be raised out of the recesses f3 by hand by means of a lever M, pivoted at M' to the fall-block frame f at the moment of commencing to hoist fthe bucket, or, if desired, it may be left in its inl operative position until the load is raised, in

which 'case it willbe automatically raised out ofthe said recesses by contact of the leverM with the guide-f rame or bell p of the traveler.

The block J 3 then falls again into the posi-A tion shownin Fig. 2, ready for operation, as before described. In this position the latch .I is locked by the hook of the lever J 4, which lls up the space in which the projection J5 turns for unlatchng, and lthe hook itself is likewise locked in a position which'compels i't'to engage with the shoulder J 6. The block J? in falling rearms the pawl-carrier G by drawing it to the right.'

Whenthe releasing or tipping mechanism is left out of gear until the load is raised far enough to permit the shifting lever M to be automatically actuated, as above described, extra safety is insured in the working of the IIO apparatus, because the load cannot beaccidentally released during the i..ising of the same; but after'it has been raised to a predetermined height it can' be lowered to any desired position and then released. It is n ot,

. however, absolutely necessary to provide this extra safeguard.-

In the modification of our invention shown in Figs. 9 and 10 the guideway or race for the pavvhcarrier G consists of a fixed part f2 and a movable part f5, pivoted at f6 to the 4fall-block frame f and having its other end connected, by means of a link M2, to a shifting lever M,.pivotpd at M to the'said frame. When the outer end of the lever Mis raised, as shown in Fig. 10, the movable part f5 of the guideway is lo'wered and the pawl K thus withdrawn from the sheaveH. When in the lifting of the load. the lever M is depressed into the position shown in Fig. V9, as by the guide-frame or bell p on thev traveler A, the movable piece f5 lis raised to the position shown in this figure, so that the pawls K can be acted upon by the shoulders H2 H3 on the sheave H and is locked in this position by the toggle-joint formed by the short arm ot' the lever M and the link M2, further downward motion of the said lever being prevented by a stop f7. When the lever M is again pushed up and the movable part of the race f5 brought to the position shown in Fig. 10, the shoulder f12 has moved into a position relative to the direction of the pull of the cord G, which leaves the carrier free to slip off the shoulder and return to the position shown in Fig. 10, ready for further operation.

The latch J`(shown in Fig. 9) ispivoted at Js to an arm m, pivoted at m to the bail F. The motion of the bucket F about its trunnions F3 is limited in one direction by means of a stop F5, while the tipping of the ,said bucket by gravity is controlled by the latch J, which rises about its pivot J8 to permitthe edge of the bucket to pass under it and which is connected to the releasing chain or cord G', so that it can be thereby turned about its pivot to disengage it from the bucket and permit the dumping of the load.

In Figs. 11 and 12 we have shown a moditication of the pawl-car'rier in which the bar L' is adapted to be locked in position when the pawls are cocked by means of a spring detent or latch L6, which is pivoted at L8 to the frame of the pawl-carrier G, as shown, and which engages with a shoulder L5 on the bar L. In thev movement of the pawl-carrier to the left this latch L6 is disengaged from the said shoulder by a'n inclined projection-j on'the frame ffor the purpose of releasing the rack L and allowing the pawls K to return to their normal position.

In the arrangement shown in Figs. 13 to 16 the pivot-pin K of the pawls K is mounted in the end of a lever N, pivoted at N to a lever P, which turns about a pin P', fixed in the fall-block framef. The lever P is coupled by means of a link M2 to a lever M, pivoted at v M to the frame fof the fall-block, the motion of the lever M being limited by the pin M3, which connects the lever M and link M2 and which works in slots f8 in the fall-block frame f. O'n the pin N' is also pivoted a bellcrank lever Q, to the arm Q of which the releasin cord or chain G' is attached. The

said arm Q bears against the fixed pin P', as shown inFigs. 13 and 14, and another arm Q2 of the said bell-crank lever Q bears against the lever N and serves as a stop for the latter. For the purpose of holding the pawls K in their free or normal position and returning them to that position when required we also mount on the pin N a third lever R, which is pressed by its spring R against a cam K3, fixed on the pivot-pin K of the said pawls, and is adapted to enter a notch ordepressionl in the said cam,- as shown in Fig. 13. The said spring R is connected at one end to the lever lR and at its other end to the curved part Q3 of the bell-crank lever Q, and thereL fore serves also to hold the lever N against the arm or stop Q2.

The releasing mechanism is shown in Fig. 13 ont of action, the lever M having been moved by hand so as to turn the lever P about its pivot P, and thus move the'pawls K away from the sheave H. XVhen the fall-block f, with the bucket attached, is lifted until the said block.enters the guide-frame or bell of the traveler, the action of the load-suspending hook or hooks e turns the levers M and P about their respective pivots, so as to bring the pawls K within reach of the shoulders H H3 of the sheave H. When the fall-block is lowered, thev sheave II, revolving in the direction indicated by the arrow in Fig.` 13, cocks the pawls K, turning thesame over into the position shown in Fig. 14. In this movement the lever or pawl-carrier N and the spring-arm R are depressed, and then when the projection on the sheave has passed farther to the right the parts assume the position shown in Fig. 14, which is the cocked or driving position. The said levers M and P remain in the position indicated in Fig. 14, because the toggle-joint formed by the lever M and link M2 is on or past the dead-center, and therefore resists the upward pressure on the right-hand end of the lever P due tothe weight of the bell-crank lever'Q and its adjuncts. On again commencing to hoist up the fall-block the sheave II, revolving in the direction indicated 4by the arrow in Fig. 14, turns the pawl-carrier N, and with it the bellcrank lever Q, int-o the position shown in Fig. 1G, the chain G being thereby drawn up and the load dumped, after 4which, the pawls K bythe action of the spring-lever R upon the roo cam K3 are caused to ly back to their norv mal position, and the bell-crankflever falls back to the position shown in Fig. 14, whenv it is again ready for action.

To put the gear out of action, it is necessary to move the exterior arm of the lever M1 to the right,when the parts return to the position shown in Fig. 13.

The lever M may, if desired, be so arranged that it will be automatically operated by contact with an abutment or other device projecting from the overhead track or with the traveler or with a weight suspended from the gib of a crane.

' The latch J in the load-hook V.v The said .17,the height ground can be adjusted bymeans of a cord passed over a suitable guide-- This sheave Y is mounted For'us'e with an ordinary crane 'the .np part of the lever M may be extended toa sition'where it will come into contact with a` heavy weightW, Fig. 17, which is suspended from the gib of the crane and which will turn the said lever about Y is raised. In the arrangement shown in Fig. of the weight W above the or chain W', pulley. Other suitable means can also be employed, if desired, for automatically setting the, releasingmecha'nism in the raising of the load. It isevident, however, that if this extra safeguard is deemed lnnnccessarythe oscillating pawl-carrier N and the bell-crank lever Qcan be pivoted at N to the fall-block, f

frame f.

arrangement vshown in Figs. 1et and 15 is suspended from a-lever S, pi voted at S to the bail F. The lever S and latch J are raised-to release the bucket by a hook T, suspended from the oted to the free end of arms T', whichin turn are pivoted at T2 to a load-hook V, attached by chains V 'to .the fall-.block f. The said arms yT keep the hook T in the plane of the hookT engages with a curvedportion of the lever S, which is approximately concentric with the pointl V2, so that theswinging of the bucket will not alter the distancebetween the hook Tand the said lever S. 'The hook T is similarly curved' at .its lower end for the same purpose.

'When the chain Gis hauled inA by the pawlcarrier, itraises the ho'ok T, which in turn raises the latch J and allows the bucket to tilt.

.The hookTinstead of workingv below the load-hook V vmay be arranged to work above the same'Las .shownfin Figs. 23 and 24. The lever S'in these figures is connected to the spring-:latchJ by means .of la cordor chain'S2, passing 'around suitable pulleys'F2 on the bail Fand over a v.pulley Sgen th'elever S land securedto thesaidfbail, yso that when .the said hook T ,'isuraisednt#willrhaul in thev cord or chain vS -,Ia1d thus ditcngagefthe'said latch.v

In" the .mddirfication 7olii ourlin'vention illustratedin Figs.. 1.8 and. 19we1employ an' auxfili'a'ry .sheave (or sheaves)-Y,"tofwhich the rei' leasing dr l,tipping chain G. is attached at Y.'

as the sheave Hand thetwo sheaves are free v to revolve' independentlyof each other' except when thefpawl Kjs i-n operative position.y In

the arrangemeht fshownlaA lever or pawl-carrier Nja"bel'l-cra'nk'lever Q, and aspring-arm R, similar to vthose described with. reference 'to Figs? '13"to16,"arev pivotedat N' to the in neirlsidev {ofjt'he a`u'xiliarysh,eave ."Y, and. @he shonlder`s2H2 Haare formed-on Athe ,interior of aflange 'on the Y2 in the sheave'Yihto' a'V curved'raceorcamgroove4 f 9 in the fall-block frame f. When this stop-pin is at either extremity of the said cam-groove f2, the pawl K is ont of reach of its pivot when the loady throw the pawl K dump the load.

y raised directly by on the same axis sheave y A vstop-pin Q2 inf the belli-crank lever Qextends through a slot' thel shoulders H2H3-onthe sheave H. To

bring the said vpawl into the path ofthese shoulders when the parts are in they position shown in Fig. 18, the sheave Yrequires to be turned through a small angle in the direction indicated by the arrow in Fig. 18, so as to bring the pin Q2 part of the said cam -groove. fectedin the lifting of the load by a lever M, pivoted at M to the fall-blockframe'f and having a pin M4 projecting from itr through a slotf10 in the press against a cam Y3 weight W or any other suitable device provided for the purpose turning-the lever M from the position shown vin Fig. 18 to that shown in Fig. 19. The curved upper face vof the cam Y8 -is so shaped that it will retain the lever'M in the position shown in Fig. 19, as is done by the toggle-joints in the arrangements hereinbefore described. In the lowering of the load the cocking'ot. the pawl K will be eected by' the sheave H, and then b v again hauling in the lifting-ropeD thesheave Y can be turned through the medium of the sheave H and pawl K in' the direction indicated by the arrows in Figs. 18 and 19, so 'as to wind the chain G' more or less upon the said sheave Y, and thus eiect the tipping of the bucket or, if desired, the disengagement of the bucket-latch. On raising the leverMby hand the weight of the bucket will move the sheave Y back to its original position and out of action. By this form of construction we can provide for the hauling in .of a considerable length' of the cord or chain'Gr, and so, it'4 desired, bodily This is efon the sheave Y, the

, tip the bucket or tray, as indicated by dotted lines/in Fig. 18.

We sometimes over the auxiliary ends to the bucket pass the 4cord or chain G yis hauled in the other ispaid out, and the bucket or tray is thus tiltedor tipped so as to We do not confine ourselves to the application of our invention to a hoisting-,machine provided with ya Vmultiple-purchase liftingtackle. It is evident that when the load is into the circumferential said frame and adapted tov 'IDO Ilo:

sheave Y andvattach both` or tray, as shown in Fig. 20, so that as one end of the said cord or chain the lifting-rope D an idle rope D', Fig. 21, passing over a sheave H4 in a fall-block fis, rope D and kept taut `by acounte-rweight W2, can be made toeect the samepurpose. We can also in some cases dispense with the use of a sheave for actuating the releasing or tipping mechanism. For instance, inA Fig. 22 'we'have shown an arrangement in reversible pawl K is actuated by a weightWs, having cooking and operating shoulders'H2 Hivand sliding vertically through a sufcient y f space upon'a. bar D2,attachedto the lifting rope or chain D, so as to answer the same purpose as the sheave above described. The weight WiI is which passes over pulleys on the crane-gib suspended. from the liftingiz5 Whih the suspended from a chain D3,

or the like, and is provided vwith a counterweight' that just balances the weight 0f WY. The pawl-carrier N is mounted on a lever P, pivoted at P to a frame P2, which is restrained from vertical motion relatively to the liftingrope D and rod D. In the position shown the load has been lowered and the pawl cocked. On again raising the load the pawl-carrier N rises relatively to the weight Wand the pawl K engaging the shoulder H3 the releasing or tipping mechanism is operated-as in the other cases above described.

Fig. shows the application of our invention to a grab that is lifted, lowered, and operated by a single rope or chain D. The grab shown, with the exception of the unlocking device, is simi-lar to that kno-Wn as Hones patent grab and need not be described furtherl than to state that when the vgrab is closed the opening ofthe same is prevented by means of the notched pin y', carried by the sliding block y, engaging in a notch 1n the side ofV the stem ya of the sliding cross-heady', which is connected by the rods or links y? with the pivoted jaws of the grab. rlhe pir-n y is notched, so that when itV is rotated through an angle of, say, sixty degrees the cross-head y is freeto fall. i We mount our'pawl-carrier N on this pin y' and operate it bya weight W5, as in the arrangement shown in Fig. 22. The pawl-lever Q is extended to Cthe left and counterbalanced to keep' it in or return it to its normal position.

Fig. 26 shows the application `of our said invention to a grab similar to that shown in Fig. 25, except that. the lifting-rope D has a double purchase. In this case our pawl-cars rier N is mounted o n thesamepin' y', `but-is operated by the sheave Hin themanner here'- in-before described.

It is obvious that the details'of construc-l tion of ou-r improved apparatus Vcan be somewhat furtherV modified, if desired, without departing from the nature of our said invention.

What we claim is y l '1. Inan apparatusfordnmpingorxeleasing loads suspendedfrom a lifting-rope, the combination, with the lifting-rope, of a retaining device suspended therefrom for temporarily preventing the dumping or release of the suspended load, a movable pawl-carrier having deredmember also snspendedfrom said lifting-rope whereby, in the paying out and haul- .ing in of said .lifting rope', said reversible pawl is rst cocked and said pawl-carrierthen.

moved through the medium of ythe saidrei` versible pawl to bring aboutthe dumpi'ngor release of the suspended load.

2. `In anapparatus for dum pingor releasing Vloads suspended from a liftingfrope, the comf bination, with said lifting-rope, of `aretaining device suspended therefrom for temporarily preventing the dumping or release of the sus- 'the-n moved through the medium of the said ing or 'one direction, to disengage said retaining device, and a shouldered member also suspended from said lifting-rope and movable relatively to saidframe, whereby, in the paying out and hauling in of said rope, said reversible pawl is first cocked and said pawlcarrier then moved through the medium of the said reversible p awl to bring about the dumping or release of the suspended load.

3. In an apparatus for dumping or releasing loads suspended from a lifting-rope, the combination, Withthe lifting-rope, of a retaining device suspended therefrom for temporarily a5 pended load, a movable pawl-'carrier having a reversible .pawl and adapted, when moved in one direction, to disengage said retaining device, a support for said pawl-carrier suspended from said lifting-rope, and a shonl- 9o dered member also suspended from said lift` l ing-rope whereby, in the paying out land hanlingin of said lifting-rope, said reversible pawl'fisfiirst cocked and said pawl-carrier r reversible pawl to bring about the dumping or release of the suspendedload, a pivoted lever whereby said reversible pawl and pawl f carrier are thrown .out of gear with said sh`ou1 dered member after the load is 'dumped or reroo leased, and means to actuate said lever when a fresh; load is`vl raised to a predetermined height and thus throw said reversible pawl and pawl-carrier into gear, for the purposes above specified. :o5

' 4. The combination of a lifting or hoisting y, tackle comprising a lifting rope or chain, a frame suspended therefrom, a shouldered member also suspended therefrom and mov` able relatively tosaid frame by both paying out and hauling in pffsaid rope or chai`n','a retaining device for temporarily' preventingthe dumping or release of the suspended load, a pawl-carrier withv a reversible pawl carried by saidvframel andadapted to be actuated'by x15 said shouldered member, to disengage laid retainifg'device, and'means tor throw said reversible pawl. and? pawl-carrier ont of gear with saidshouldered member after the dump lease of the'load, and to automatioall y th ow it into gear when the load israised r transported to a'predetermined position, for the purposes above specified.

5. The combination of aliftin'g or hoistin tackle comprising a lifting l'rope or chain an a pulleyfblock suspended therefrom and having a shouldered '.s'heave, a' retaining device y [for temporarily preventingthe dumping or :release of the suspendedload, and a.

pawlcarri'er with a reversible pawl carried by the no -frarne of said pulley-block andadapted-to bev actuated bytheshonlderedshe'ave thereof to disengage said retaining device, substantially as,i and y for thepurposes above specified.

G. The combination, with a lifting or hoisting tackle, ofv a latching device,-a pawl-carrier connected therewith and having a reversible pawl, a'support for. said pawl-carrier suspended from the lifting rope or chain, a shouldered member also suspended from said rope or chain and movable relatively to Said support, and adapted to actuate said pawlcarrier .to disengage 'said latching device, for

the purposes abo've specified. y

r7. The combination, withalifting or hoisting tackle, of load-releasin g mechanism com-V prisinga reciprocating or oscillating carrier arrangedl in a frame suspended from the lifting rope orchain and a reversible pawl pivoted to said carrier, a 'guideway or race for said carrier made in twO ,parts one of which is movable relatively to the other, and a lever forv raising said movable part of the guide,

way into its operative position and lowering it therefrom for the purposes above specified.

land an 'operating device for said mechanism also suspended from 'said' rope or chain, for the purposes above-specified.

9. The combination, with a lifting or hoisting tackle and a frame suspended from the lifting rope or chain thereof, of load-releasing l mechanism comprising a reciprocating or oscillating carrier arranged in ,said frame and a reversible pawl pivoted to said carrier,

means, substantially such as are hereinbefore described, for holding said reversible pawl in and returning it to its inoperative` position,

and for lockingsaid reversible pawl in its cocked position and unlocking it after the release or dumping of the load, and an'operatin g device for said mechanism also suspended from saidrope or chain, for the purposes above specified.

io. The Combination, with a lifting or hoist;

ing tackle, of a frame suspended from the lift-- ing-rope, a pawl-carrier with a reversible pawl 'mounted insaid frame, a load-releasing cord or chain connected with said pawl-carrier, and a shouldered member also suspended from said lifting-rope and movable relatively to saidI frame, whereby in the paying out and hauling in of saidlifting-rope, said reversible pawl is first cocked and said pawl-carrier then actuated through the medium of the said reversible pawl to haul in said releasing cord or chain and thus bring about the dumping or release of the load.

1l. The combination, with a lifting or hoisting tackle, of load-releasing mechanism, a reversible'pawl for actuating said load-releasing mechanism,'meansfor cooking or reversing said pawl dnring lowering of the load, and means for connecting said cocked or reversed pawl with said load-releasing mechanism,sub stantially as, and for the purposes, hereinbefore described.

In testimony whereof we'have hereunto setY our hands in presence of two subscribing witL messes.

JOSEPH TEMPERLEY. JOHN' RIDLEY f rmarmsrnmr- Witnesses: s

C. WILSON, J. E. BOVEY. 

